1|Page
Computed Tomography Exam Prep Material
Newest 2025/2026 Complete All Questions
And Correct Detailed Answers (Verified
Answers)|Brand New Version!
Which of the following reduces the scatter radiation
reaching the detectors?
A. Post-patient collimation
B. Pre-patient collimation
C. Pre-detector collimation
D. Both A & C - . . ANSWER ✔ ✔D. Both A & C
Which of the following is the primary interaction between
x-ray photons and tissue during computed tomography?
A. Bremsstrahlung
B. Characteristic
C. Compton effect
D. Coherent scatter - . . ANSWER ✔ ✔C
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The process by which electrons are produced at the
cathode of a CT x-ray tube is known as:
A. rectification
B. anode heel effect
C. thermionic emission
D. isotropic emission - . . ANSWER ✔ ✔C
The assignment of different generations to CT scanners is
based on the configuration of the:
A. patient and gantry
B. tube and detectors
C. anode and cathode
D. tube and collimators - . . ANSWER ✔ ✔B
When one is using a third-generation CT scanner, it is
important that reference detectors positioned at the
peripheral portions of the detector array be exposed to:
A. homogeneous radiation
B. unattenuated radiation
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C. monochromatic radiation
D. remnant radiation - . . ANSWER ✔ ✔D
In 1979, the scientists __________ and __________
shared the Nobel Prize for their research in computed
tomography
A. Watson and Crick
B. Olendorf and Hounsfield
C. Hounsfield and Cormack
D. Hounsfield and Ambrose - . . ANSWER ✔ ✔C
The type of compensating filter used at the x-ray tube of a
CT scanner is called a:
A. kernel
B. water bath
C. bow-tie filter
D. wedge filter - . . ANSWER ✔ ✔C
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The interaction between x-ray and matter that is
responsible for the production of the scatter radiation
absorbed by the patient and detectors is:
A. Compton effect.
B. bremsstrahlung.
C. photoelectric.
D. characteristic - . . ANSWER ✔ ✔A
The types of detectors used in computed tomography are:
1. Gas ionization
2. Stimulable phosphor
3. Scintillation
A. 1 only
B. 3 only
C. 1 and 3 only
D. 2 and 3 only - . . ANSWER ✔ ✔C
Which of the following is used in gas ionization CT
detectors?
Computed Tomography Exam Prep Material
Newest 2025/2026 Complete All Questions
And Correct Detailed Answers (Verified
Answers)|Brand New Version!
Which of the following reduces the scatter radiation
reaching the detectors?
A. Post-patient collimation
B. Pre-patient collimation
C. Pre-detector collimation
D. Both A & C - . . ANSWER ✔ ✔D. Both A & C
Which of the following is the primary interaction between
x-ray photons and tissue during computed tomography?
A. Bremsstrahlung
B. Characteristic
C. Compton effect
D. Coherent scatter - . . ANSWER ✔ ✔C
,2|Page
The process by which electrons are produced at the
cathode of a CT x-ray tube is known as:
A. rectification
B. anode heel effect
C. thermionic emission
D. isotropic emission - . . ANSWER ✔ ✔C
The assignment of different generations to CT scanners is
based on the configuration of the:
A. patient and gantry
B. tube and detectors
C. anode and cathode
D. tube and collimators - . . ANSWER ✔ ✔B
When one is using a third-generation CT scanner, it is
important that reference detectors positioned at the
peripheral portions of the detector array be exposed to:
A. homogeneous radiation
B. unattenuated radiation
,3|Page
C. monochromatic radiation
D. remnant radiation - . . ANSWER ✔ ✔D
In 1979, the scientists __________ and __________
shared the Nobel Prize for their research in computed
tomography
A. Watson and Crick
B. Olendorf and Hounsfield
C. Hounsfield and Cormack
D. Hounsfield and Ambrose - . . ANSWER ✔ ✔C
The type of compensating filter used at the x-ray tube of a
CT scanner is called a:
A. kernel
B. water bath
C. bow-tie filter
D. wedge filter - . . ANSWER ✔ ✔C
, 4|Page
The interaction between x-ray and matter that is
responsible for the production of the scatter radiation
absorbed by the patient and detectors is:
A. Compton effect.
B. bremsstrahlung.
C. photoelectric.
D. characteristic - . . ANSWER ✔ ✔A
The types of detectors used in computed tomography are:
1. Gas ionization
2. Stimulable phosphor
3. Scintillation
A. 1 only
B. 3 only
C. 1 and 3 only
D. 2 and 3 only - . . ANSWER ✔ ✔C
Which of the following is used in gas ionization CT
detectors?
